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Finding the Fourth Proportional to 251,401.20, 377,101.80 and 139,426.80

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Solution

The fourth proportional to 251,401.20, 377,101.80 and 139,426.80 is: 209,140.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,401.20 : 377,101.80 = 139,426.80 : x
  2. Step 2: Convert to fraction form
    251,401.20/377,101.80 = 139,426.80/x
  3. Step 3: Cross multiply
    251,401.20x = 377,101.80 × 139,426.80
  4. Step 4: Simplify right side
    251,401.20x = 52,578,097,248.24
  5. Step 5: Solve for x
    x = 52,578,097,248.24/251,401.20
  6. Step 6: Final answer
    x = 209,140.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.